<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2018 Teclib' and contributors.
 *
 * http://glpi-project.org
 *
 * based on GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2003-2014 by the INDEPNET Development Team.
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * GLPI is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GLPI is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GLPI. If not, see <http://www.gnu.org/licenses/>.
 * ---------------------------------------------------------------------
 */

if (!defined('GLPI_ROOT')) {
   die("Sorry. You can't access this file directly");
}


/** QueuedNotification class
 *
 * @since 0.85
**/
class QueuedNotification extends CommonDBTM {

   static $rightname = 'queuednotification';


   static function getTypeName($nb = 0) {
      return __('Notification queue');
   }


   static function canCreate() {
      // Everybody can create : human and cron
      return Session::getLoginUserID(false);
   }


   static function getForbiddenActionsForMenu() {
      return ['add'];
   }


   function getForbiddenStandardMassiveAction() {

      $forbidden   = parent::getForbiddenStandardMassiveAction();
      $forbidden[] = 'update';
      return $forbidden;
   }


   /**
    * @see CommonDBTM::getSpecificMassiveActions()
   **/
   function getSpecificMassiveActions($checkitem = null, $is_deleted = false) {

      $isadmin = static::canUpdate();
      $actions = parent::getSpecificMassiveActions($checkitem);

      if ($isadmin && !$is_deleted) {
         $actions[__CLASS__.MassiveAction::CLASS_ACTION_SEPARATOR.'sendmail'] = _x('button', 'Send');
      }

      return $actions;
   }


   /**
    * @see CommonDBTM::processMassiveActionsForOneItemtype()
   **/
   static function processMassiveActionsForOneItemtype(MassiveAction $ma, CommonDBTM $item,
                                                       array $ids) {
      switch ($ma->getAction()) {
         case 'sendmail' :
            foreach ($ids as $id) {
               if ($item->canEdit($id)) {
                  if ($item->sendById($id)) {
                     $ma->itemDone($item->getType(), $id, MassiveAction::ACTION_OK);
                  } else {
                     $ma->itemDone($item->getType(), $id, MassiveAction::ACTION_KO);
                  }
               } else {
                  $ma->itemDone($item->getType(), $id, MassiveAction::ACTION_NORIGHT);
               }
            }
            return;
      }
      parent::processMassiveActionsForOneItemtype($ma, $item, $ids);
   }


   function prepareInputForAdd($input) {
      global $DB;

      if (!isset($input['create_time']) || empty($input['create_time'])) {
         $input['create_time'] = $_SESSION["glpi_currenttime"];
      }
      if (!isset($input['send_time']) || empty($input['send_time'])) {
         $toadd = 0;
         if (isset($input['entities_id'])) {
            $toadd = Entity::getUsedConfig('delay_send_emails', $input['entities_id']);
         }
         if ($toadd > 0) {
            $input['send_time'] = date("Y-m-d H:i:s",
                                       strtotime($_SESSION["glpi_currenttime"])
                                                      +$toadd*MINUTE_TIMESTAMP);
         } else {
            $input['send_time'] = $_SESSION["glpi_currenttime"];
         }
      }
      $input['sent_try'] = 0;
      if (isset($input['headers']) && is_array($input['headers']) && count($input['headers'])) {
         $input["headers"] = exportArrayToDB($input['headers']);
      } else {
         $input['headers'] = '';
      }

      if (isset($input['documents']) && is_array($input['documents']) && count($input['documents'])) {
         $input["documents"] = exportArrayToDB($input['documents']);
      } else {
         $input['documents'] = '';
      }

      // Force items_id to integer
      if (!isset($input['items_id']) || empty($input['items_id'])) {
         $input['items_id'] = 0;
      }

      // Drop existing mails in queue for the same event and item  and recipient
      if (isset($input['itemtype']) && !empty($input['itemtype'])
          && isset($input['entities_id']) && ($input['entities_id'] >= 0)
          && isset($input['items_id']) && ($input['items_id'] >= 0)
          && isset($input['notificationtemplates_id']) && !empty($input['notificationtemplates_id'])
          && isset($input['recipient'])) {
         $criteria = [
            'FROM'   => $this->getTable(),
            'WHERE'  => [
               'is_deleted'   => 0,
               'itemtype'     => $input['itemtype'],
               'items_id'     => $input['items_id'],
               'entities_id'  => $input['entities_id'],
               'notificationtemplates_id' => $input['notificationtemplates_id'],
               'recipient'                => $input['recipient']

            ]
         ];
         $iterator = $DB->request($criteria);
         while ($data = $iterator->next()) {
            $this->delete(['id' => $data['id']], 1);
         }
      }

      return $input;
   }


   function rawSearchOptions() {
      $tab = [];

      $tab[] = [
         'id'                 => 'common',
         'name'               => __('Characteristics')
      ];

      $tab[] = [
         'id'                 => '1',
         'table'              => $this->getTable(),
         'field'              => 'name',
         'name'               => __('Subject'),
         'datatype'           => 'itemlink',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '2',
         'table'              => $this->getTable(),
         'field'              => 'id',
         'name'               => __('ID'),
         'massiveaction'      => false,
         'datatype'           => 'number'
      ];

      $tab[] = [
         'id'                 => '16',
         'table'              => $this->getTable(),
         'field'              => 'create_time',
         'name'               => __('Creation date'),
         'datatype'           => 'datetime',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '3',
         'table'              => $this->getTable(),
         'field'              => 'send_time',
         'name'               => __('Expected send date'),
         'datatype'           => 'datetime',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '4',
         'table'              => $this->getTable(),
         'field'              => 'sent_time',
         'name'               => __('Send date'),
         'datatype'           => 'datetime',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '5',
         'table'              => $this->getTable(),
         'field'              => 'sender',
         'name'               => __('Sender email'),
         'datatype'           => 'text',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '6',
         'table'              => $this->getTable(),
         'field'              => 'sendername',
         'name'               => __('Sender name'),
         'datatype'           => 'string',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '7',
         'table'              => $this->getTable(),
         'field'              => 'recipient',
         'name'               => __('Recipient email'),
         'datatype'           => 'string',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '8',
         'table'              => $this->getTable(),
         'field'              => 'recipientname',
         'name'               => __('Recipient name'),
         'datatype'           => 'string',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '9',
         'table'              => $this->getTable(),
         'field'              => 'replyto',
         'name'               => __('Reply-to email'),
         'datatype'           => 'string',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '10',
         'table'              => $this->getTable(),
         'field'              => 'replytoname',
         'name'               => __('Reply-to name'),
         'datatype'           => 'string',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '11',
         'table'              => $this->getTable(),
         'field'              => 'headers',
         'name'               => __('Additional headers'),
         'datatype'           => 'specific',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '12',
         'table'              => $this->getTable(),
         'field'              => 'body_html',
         'name'               => __('Email HTML body'),
         'datatype'           => 'text',
         'massiveaction'      => false,
         'htmltext'           => true
      ];

      $tab[] = [
         'id'                 => '13',
         'table'              => $this->getTable(),
         'field'              => 'body_text',
         'name'               => __('Email text body'),
         'datatype'           => 'text',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '14',
         'table'              => $this->getTable(),
         'field'              => 'messageid',
         'name'               => __('Message ID'),
         'datatype'           => 'string',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '15',
         'table'              => $this->getTable(),
         'field'              => 'sent_try',
         'name'               => __('Number of tries of sent'),
         'datatype'           => 'integer',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '20',
         'table'              => $this->getTable(),
         'field'              => 'itemtype',
         'name'               => __('Type'),
         'datatype'           => 'itemtype',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '21',
         'table'              => $this->getTable(),
         'field'              => 'items_id',
         'name'               => __('Associated item ID'),
         'massiveaction'      => false,
         'datatype'           => 'integer'
      ];

      $tab[] = [
         'id'                 => '22',
         'table'              => 'glpi_notificationtemplates',
         'field'              => 'name',
         'name'               => _n('Notification template', 'Notification templates', 1),
         'massiveaction'      => false,
         'datatype'           => 'dropdown'
      ];

      $tab[] = [
         'id'                 => '23',
         'table'              => 'glpi_queuednotifications',
         'field'              => 'mode',
         'name'               => __('Mode'),
         'massiveaction'      => false,
         'datatype'           => 'specific',
         'searchtype'         => [
            0 => 'equals',
            1 => 'notequals'
         ]
      ];

      $tab[] = [
         'id'                 => '80',
         'table'              => 'glpi_entities',
         'field'              => 'completename',
         'name'               => __('Entity'),
         'massiveaction'      => false,
         'datatype'           => 'dropdown'
      ];

      return $tab;
   }


   /**
    * @param $field
    * @param $values
    * @param $options   array
   **/
   static function getSpecificValueToDisplay($field, $values, array $options = []) {

      if (!is_array($values)) {
         $values = [$field => $values];
      }
      switch ($field) {
         case 'headers' :
            $values[$field] = importArrayFromDB($values[$field]);
            $out='';
            if (is_array($values[$field]) && count($values[$field])) {
               foreach ($values[$field] as $key => $val) {
                  $out .= $key.': '.$val.'<br>';
               }
            }
            return $out;
            break;
         case 'mode':
            $out = Notification_NotificationTemplate::getMode($values[$field])['label'];
            return $out;
            break;

      }
      return parent::getSpecificValueToDisplay($field, $values, $options);
   }


   static function getSpecificValueToSelect($field, $name = '', $values = '', array $options = []) {
      if (!is_array($values)) {
         $values = [$field => $values];
      }
      $options['display'] = false;

      switch ($field) {
         case 'mode' :
            $options['name']  = $name;
            $options['value'] = $values[$field];
            return Notification_NotificationTemplate::dropdownMode($options);
      }
      return parent::getSpecificValueToSelect($field, $name, $values, $options);
   }


   /**
    * Send notification in queue
    *
    * @param integer $ID Id
    *
    * @return boolean
    */
   public function sendById($ID) {
      if ($this->getFromDB($ID)) {
         $mode = $this->getField('mode');
         $eventclass = 'NotificationEvent' . ucfirst($mode);
         $conf = Notification_NotificationTemplate::getMode($mode);
         if ($conf['from'] != 'core') {
            $eventclass = 'Plugin' . ucfirst($conf['from']) . $eventclass;
         }

         return $eventclass::send([$this->fields]);
      } else {
         return false;
      }
   }


   /**
    * Give cron information
    *
    * @param $name : task's name
    *
    * @return arrray of information
   **/
   static function cronInfo($name) {

      switch ($name) {
         case 'queuednotification' :
            return ['description' => __('Send mails in queue'),
                         'parameter'   => __('Maximum emails to send at once')];

         case 'queuednotificationclean' :
            return ['description' => __('Clean notification queue'),
                         'parameter'   => __('Days to keep sent emails')];

      }
      return [];
   }


   /**
    * Get pending notifications in queue
    *
    * @param string  $send_time   Maximum sent_time
    * @param integer $limit       Query limit clause
    * @param array   $limit_modes Modes to limit to
    * @param array   $extra_where Extra params to add to the where clause
    *
    * @return array
    */
   static public function getPendings($send_time = null, $limit = 20, $limit_modes = null, $extra_where = []) {
      global $DB, $CFG_GLPI;

      if ($send_time === null) {
         $send_time = date('Y-m-d H:i:s');
      }

      $base_query = [
         'FROM'   => self::getTable(),
         'WHERE'  => [
            'is_deleted'   => 0,
            'mode'         => 'TOFILL',
            'send_time'    => ['<', $send_time],
         ] +  $extra_where,
         'ORDER'  => 'send_time ASC',
         'START'  => 0,
         'LIMIT'  => $limit
      ];

      $pendings = [];
      $modes = Notification_NotificationTemplate::getModes();
      foreach ($modes as $mode => $conf) {
         $eventclass = 'NotificationEvent' . ucfirst($mode);
         if ($conf['from'] != 'core') {
            $eventclass = 'Plugin' . ucfirst($conf['from']) . $eventclass;
         }

         if ($limit_modes !== null && !in_array($mode, $limit_modes)
            || !$CFG_GLPI['notifications_' . $mode]
            || !$eventclass::canCron()
         ) {
            //mode is not in limits, is disabled, or cannot be called from cron, passing
            continue;
         }

         $query = $base_query;
         $query['WHERE']['mode'] = $mode;

         $iterator = $DB->request($query);
         if ($iterator->numRows() > 0) {
            $pendings[$mode] = [];
            while ($row = $iterator->next()) {
               $pendings[$mode][] = $row;
            }
         }
      }

      return $pendings;
   }


   /**
    * Cron action on notification queue: send notifications in queue
    *
    * @param CommonDBTM $task for log (default NULL)
    *
    * @return integer either 0 or 1
   **/
   static function cronQueuedNotification($task = null) {
      global $DB, $CFG_GLPI;

      if (!Notification_NotificationTemplate::hasActiveMode()) {
         return 0;
      }
      $cron_status = 0;

      // Send notifications at least 1 minute after adding in queue to be sure that process on it is finished
      $send_time = date("Y-m-d H:i:s", strtotime("+1 minutes"));

      $mail = new self();
      $pendings = self::getPendings(
         $send_time,
         $task->fields['param']
      );

      foreach ($pendings as $mode => $data) {
         $eventclass = 'NotificationEvent' . ucfirst($mode);
         $conf = Notification_NotificationTemplate::getMode($mode);
         if ($conf['from'] != 'core') {
            $eventclass = 'Plugin' . ucfirst($conf['from']) . $eventclass;
         }

         $result = $eventclass::send($data);
         if ($result !== false) {
            $cron_status = 1;
            if (!is_null($task)) {
               $task->addVolume($result);
            }
         }
      }

      return $cron_status;
   }


   /**
    * Cron action on queued notification: clean notification queue
    *
    * @param CommonDBTM $task for log (default NULL)
    *
    * @return integer either 0 or 1
   **/
   static function cronQueuedNotificationClean($task = null) {
      global $DB;

      $vol = 0;

      // Expire mails in queue
      if ($task->fields['param'] > 0) {
         $secs      = $task->fields['param'] * DAY_TIMESTAMP;
         $send_time = date("U") - $secs;
         $vol = $DB->delete(
            self::getTable(), [
               'is_deleted'   => 1,
               new \QueryExpression('(UNIX_TIMESTAMP('.$DB->quoteName('send_time').') < '.$DB->quoteValue($send_time).')')
            ]
         );
      }

      $task->setVolume($vol);
      return ($vol > 0 ? 1 : 0);
   }


   /**
    * Force sending all mails in queue for a specific item
    *
    * @param string  $itemtype item type
    * @param integer $items_id id of the item
    *
    * @return void
   **/
   static function forceSendFor($itemtype, $items_id) {
      global $DB;

      if (!empty($itemtype)
         && !empty($items_id)) {
         $pendings = self::getPendings(
            null,
            1,
            null,
            [
               'itemtype'  => $itemtype,
               'items_id'  => $items_id
            ]
         );

         foreach ($pendings as $mode => $data) {
            $eventclass = Notification_NotificationTemplate::getModeClass($mode, 'event');
            $eventclass::send($data);
         }
      }
   }


   /**
    * Print the queued mail form
    *
    * @param integer $ID      ID of the item
    * @param array   $options Options
    *
    * @return true if displayed  false if item not found or not right to display
   **/
   function showForm($ID, $options = []) {
      global $CFG_GLPI;

      if (!Session::haveRight("queuednotification", READ)) {
         return false;
      }

      $this->check($ID, READ);
      $options['canedit'] = false;

      $this->showFormHeader($options);
      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Type')."</td>";

      echo "<td>";
      if (!($item = getItemForItemtype($this->fields['itemtype']))) {
         echo NOT_AVAILABLE;
         echo "</td>";
         echo "<td>"._n('Item', 'Items', 1)."</td>";
         echo "<td>";
         echo NOT_AVAILABLE;
      } else if ($item instanceof CommonDBTM) {
         echo $item->getType();
         $item->getFromDB($this->fields['items_id']);
         echo "</td>";
         echo "<td>"._n('Item', 'Items', 1)."</td>";
         echo "<td>";
         echo $item->getLink();
      } else {
         echo get_class($item);
         echo "</td><td></td>";
      }
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>"._n('Notification template', 'Notification templates', 1)."</td>";
      echo "<td>";
      echo Dropdown::getDropdownName('glpi_notificationtemplates',
                                     $this->fields['notificationtemplates_id']);
      echo "</td>";
      echo "<td>&nbsp;</td>";
      echo "<td>&nbsp;</td>";
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Creation date')."</td>";
      echo "<td>";
      echo Html::convDateTime($this->fields['create_time']);
      echo "</td><td>".__('Expected send date')."</td>";
      echo "<td>".Html::convDateTime($this->fields['send_time'])."</td>";
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Send date')."</td>";
      echo "<td>".Html::convDateTime($this->fields['sent_time'])."</td>";
      echo "<td>".__('Number of tries of sent')."</td>";
      echo "<td>".$this->fields['sent_try']."</td>";
      echo "</tr>";

      echo "<tr><th colspan='4'>".__('Email')."</th></tr>";
      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Sender email')."</td>";
      echo "<td>".$this->fields['sender']."</td>";
      echo "<td>".__('Sender name')."</td>";
      echo "<td>".$this->fields['sendername']."</td>";
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Recipient email')."</td>";
      echo "<td>".$this->fields['recipient']."</td>";
      echo "<td>".__('Recipient name')."</td>";
      echo "<td>".$this->fields['recipientname']."</td>";
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Reply-to email')."</td>";
      echo "<td>".$this->fields['replyto']."</td>";
      echo "<td>".__('Reply-to name')."</td>";
      echo "<td>".$this->fields['replytoname']."</td>";
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Message ID')."</td>";
      echo "<td>".$this->fields['messageid']."</td>";
      echo "<td>".__('Additional headers')."</td>";
      echo "<td>".self::getSpecificValueToDisplay('headers', $this->fields)."</td>";
      echo "</tr>";

      echo "<tr class='tab_bg_1'>";
      echo "<td>".__('Subject')."</td>";
      echo "<td colspan=3>".$this->fields['name']."</td>";
      echo "</tr>";

      echo "<tr><th colspan='2'>".__('Email HTML body')."</th>";
      echo "<th colspan='2'>".__('Email text body')."</th>";
      echo "</tr>";

      echo "<tr class='tab_bg_1 top' >";
      echo "<td colspan='2' class='queuemail_preview'>".self::cleanHtml($this->fields['body_html'])."</td>";
      echo "<td colspan='2'>".nl2br($this->fields['body_text'], false)."</td>";
      echo "</tr>";

      $this->showFormButtons($options);

      return true;

   }


   /**
    * @since 0.85
    *
    * @param $string
    **/
   static function cleanHtml($string) {

      $begin_strip     = -1;
      $end_strip       = -1;
      $begin_match     = "/<body>/";
      $end_match       = "/<\/body>/";
      $content         = explode("\n", $string);
      $newstring       = '';
      foreach ($content as $ID => $val) {
         // Get last tag for end
         if ($begin_strip >= 0) {
            if (preg_match($end_match, $val)) {
               $end_strip = $ID;
               continue;
            }
         }
         if (($begin_strip >= 0) && ($end_strip < 0)) {
            $newstring .= $val;
         }
         // Get first tag for begin
         if ($begin_strip < 0) {
            if (preg_match($begin_match, $val)) {
               $begin_strip = $ID;
            }
         }
      }
      return nl2br($newstring, false);
      return preg_replace($patterns, $replacements, $string);
   }

}
